Operation Mincemeat by Ben Macintyre relates a facet of World War II that is simultaneously one of the more morbid and lighthearted stories I've read about that horrible time. The full title of the book is Operation Mincemeat: How a Dead Man and a Bizarre Plan Fooled the Nazis and Assured an Allied Victory. It relates a bizarre method the British used to convince Germany that they weren't planning to invade Sicily, which seems to have been their only reasonable target. They planted a dead body with papers that appeared to be private correspondence between Allied generals that indicated where the next major offensive would take place. While it certainly drags in places, I enjoyed the book overall.